中文摘要：

为提高潮流能利用效率，基于叶素-动量理论（ BEM），给出了Wilson模型在水平轴潮流能水轮机设计上的应用。采用CFD技术计算对设计的水轮机进行水动力特性分析，计算其在不同叶尖速比下的功率特性。在此基础上，对叶片沿展长方向的功率分布和三维绕流特性进行分析，并采用二维计算方法预测对应三维工况下各截面处的流场特性。计算结果表明，水轮机的工作特性满足对功率和效率的要求，说明了设计方法的可靠性；同时绕流特性分析也显示了二维模拟的局限性，尤其在叶根、叶尖部位失真较大，这说明三维效应对水轮机输出功率和流场性能有着显著的影响。

英文摘要：

To improve the utilization efficiency of tidal energy, the blade element momentum （ BEM） based Wilson model is applied to the design of the horizontal tidal turbine. The CFD method is adopted to calculate the turbine’ s hydrodynamic properties and power output at different tip speed ratios. Based on this data, the power output along the blade span and the 3D flow field are analyzed, and the 2D hydrofoil models at different radii are established to predict its corresponding flow field properties in a 3D model. The calculation results show that the performance char-acteristics of the turbine meet the requirements of the power output and power coefficient of the turbine, and as a result, the design method is proved to be efficient. And the 2D simulation has its limitations, it failed to predict hy-drodynamic properties correctly in places near the hub and tip. This indicates that the 3D effects have a significant impact on both the flow field and the turbine’ s work performance.